I would say that economics is really, really, really, really, really, really, really hard. And that's leaving out a few of the "reallys."

It's so hard that experts don't always do it well. The experts are constantly prone to correction by non-experts, by practitioners, by people who are self-educated economic experts but not professional economists, and by people who know some economics and a lot about some other field(s). It is very often that we -- at least some of us -- are wrong and at least some of those other people are right.